Bump io.swagger:swagger-models from 1.6.14 to 1.6.15

Bumps io.swagger:swagger-models from 1.6.14 to 1.6.15.

---
updated-dependencies:
- dependency-name: io.swagger:swagger-models
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -228,7 +228,7 @@
             <dependency>
                 <groupId>io.swagger</groupId>
                 <artifactId>swagger-models</artifactId>
-                <version>1.6.14</version>
+                <version>1.6.15</version>
             </dependency>
 
             <dependency>